Vertiv NetSure 731 A61-S3 Official White Background Photo View 1
VertivModel: NetSure 731 A61-S3

Vertiv NetSure 731 A61-S3 Subrack Switch-Mode DC Power System (-48V 300A 6U)

The Vertiv NetSure 731 A61-S3 is a 19-inch 6U rack-mounted, telecom-grade -48VDC high-frequency switch-mode power system with a maximum rating of 300A.

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Nominal Output Voltage
-48VDC VDC
AC Input Voltage Range
85VAC ~ 300VAC (Nominal 220V/380VAC) VAC
Rated Output Current
300A (System Capacity 14.4kW)
Peak Conversion Efficiency
≥96.0%
Managed Rectifier Capacity
4 Slots for R48-2900U Modules
Smart Monitoring Controller
M830B / NCU Controller

What this product is

What this product is

This subrack power solution integrates high-efficiency rectifiers, integrated AC/DC distribution breakers, and a digital controller (NCU/M830B). It converts fluctuating AC mains into clean, regulated -48V DC power while providing battery health management and dual LVD protection for critical network loads.

What problem it solves

Eliminates power conversion inefficiencies, solves footprint constraints in overcrowded telecom cabinets, and protects battery banks from catastrophic deep discharge during prolonged grid outages.

Who and where it is for

4G/5G macro cell sites, optical transport nodes, central office aggregation points, and enterprise edge data micro-modules.

Core advantages

  • High efficiency exceeding 96.0% reduces thermal load and site operational expenditures
  • Wide AC input range (85VAC to 300VAC) with derating protection for harsh grid environments
  • Integrated dual-level LVD (LLVD and BLVD) for staged critical load shedding
  • Full hot-swap modularity allows seamless live expansion and rapid MTTR reduction

Technical specifications

Key specificationsValue
AC Input Voltage Range85VAC ~ 300VAC (Nominal 220V/380VAC) VAC
Smart Monitoring ControllerM830B / NCU Controller
Cooling MethodForced Air Cooling
Nominal Output Voltage-48VDC VDC
Rated Output Current300A (System Capacity 14.4kW)
Managed Rectifier Capacity4 Slots for R48-2900U Modules
Form Factor Dimensions (HxWxD)266 (6U) × 482 × 380 mm
Peak Conversion Efficiency≥96.0%
Operating Temperature Range-40°C ~ +65°C

Applications

01

Wireless baseband unit (BBU) and remote radio head (RRH) power distribution

02

Optical transport, DWDM, and IP core router edge DC feed

03

Industrial SCADA and railway signaling backhaul DC infrastructure

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